Surfaces and Interfaces
·
2024
·
IF 5.7
Jiawei Zhu,Peng Liao,Suqiong Xu,Wei Ling,Xianke Zhang,Jujun Yuan,Chuicai Rong,Xiaoqing Liu,Zuzhou Xiong
This study presents the synthesis of Er[Co(CN) 6 ], a Prussian blue analog (ErCo-PBA) with varied morphology, fabricated by modulating the solvent ratio between C 2 H 6 O and H 2 O. This approach leverages the solubility characteristics of K 3 [Co(CN) 6 ] and the consequential influence of C 2 H 6 O on the crystal growth. When the solvent ratios are 1:8, 8:1, and 1:1, the resulting ErCo-PBA precursors nanorods, irregular particles, and spindle-shaped particles, respectively. After annealing, these precursors in an Ar environment allowed the Co/Er 2 O 3 /C derivatives to retain the morphology of the precursor well. Electromagnetic parameters testing revealed that Co/Er 2 O 3 /C-1 exhibits superior electromagnetic wave-absorbing (EMWA) performance among the synthesized derivatives with an effective absorption bandwidth of 5.1 GHz at 1.85 mm and a minimum reflection loss of −56.7 dB at 2.9 mm. The incorporation of Er 2 O 3 is an effective method for adjusting and optimizing the electromagnetic parameters of materials, thereby enhancing the EMWA performance of Co/Er 2 O 3 /C composite. This study highlights the potential of rare-earth oxide/Co/C composites, synthesized through direct annealing rare-earth metal–organic frameworks, as an absorber and are promising candidate to achieve high-efficiency electromagnetic wave absorption.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2024
·Vol. 110
·期 3
·619-634
·
IF 2.3
Chen Yutong,Liu Wensheng,Ma Yunzhu,Yao Shuwei,Wang Juan
Continuous alumina fibers with excellent thermal stability are essential in high-temperature applications. In this study, 0~1 wt% Y 0.5 Er 0.5 Ho 0.5 Yb 0.5 O 3 were added to the alumina fibers to enhance thermal stability. The impact of Y 0.5 Er 0.5 Ho 0.5 Yb 0.5 O 3 addition on alumina fibers’ transformation and microstructure evolution of during the sintering process was systematically studied. The influence of single- and two-step sintering processes on the fiber microstructures was elucidated. The results suggested that adding Y 0.5 Er 0.5 Ho 0.5 Yb 0.5 O 3 impeded fiber densification, inhibited alumina grain growth, and enhanced the thermal stability of fibers. Using a two-step sintering process facilitated the achievement of fully dense alumina fibers with fine grains. The alumina fibers added with 1.0 wt% Y 0.5 Er 0.5 Ho 0.5 Yb 0.5 O 3 exhibited a remarkable strength retention rate of up to 93% after exposure to 1200 °C for 10 h. The TEM analysis revealed that rare earth elements segregation at α-Al 2 O 3 grain boundaries due to their larger radius than the Al element contributed to stabilizing the microstructures of α-Al 2 O 3 fibers at high service temperature. Graphical Abstract
研究领域:
材料科学
·
高温材料
·
陶瓷纤维
·
热稳定性研究
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稀土掺杂技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Yuanjie Teng,Jie Li,Yantao Lou,Xingchen Zhang,Ze Wang,Naiwen Zhang,V. Balasubramani,Tianyu Hu,Zaifa Pan
Surface-enhanced Raman scattering (SERS) offers single-molecule sensitivity, but its practical use is constrained by the high cost and instability of noble-metal substrates. Semiconductor based SERS substrates are more stable and scalable, but typically suffer from weak charge transfer due to wide band gaps. Here we report a rare-earth doping strategy to boost the SERS activity of wide-band-gap ZnO. By introducing Er3+ with multielectron 4f orbitals into Zn1−xErxO (x = 0–8 mol%), the carrier density was simultaneously increased and new defect states were created that collaboratively enhance electromagnetic and chemical contributions. The optimized Er3+-doped ZnO substrate enables sensitive and reproducible detection of rhodamine 6G, achieving a detection limit of 2.4 × 10−8 M, an enhancement factor of 1.73 × 105, and excellent uniformity (RSD = 1.39%). Mott–Schottky analysis confirms carrier density increase upon Er doping, while DFT calculations attribute the dominant contribution to Er d-states and the introduction of 4f-induced surface defect levels that promote charge transfer. This work establishes rare-earth doping as an effective route to engineer semiconductor based SERS substrates and offers a mechanistic framework for designing non-metal SERS systems with synergistic electromagnetic and chemical enhancement.
研究领域:
材料科学
·
分析化学
·
纳米科技
·
半导体物理
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Lingling Wang,Yunning Chen,Yuxin Zheng,Xueying Cheng,Jiawei Hao,Qingkun Shang
Eight composite photocatalysts were synthesized. Er- and Fe-doped TiO 2 photocatalysts were prepared first, and their photocatalytic performance for phenol degradation was investigated. Furthermore, three pyridine derivatives and 1,10-phenanthroline were bonded to Er-Fe-TiO 2 , which greatly improved the efficiency and rate of photocatalytic degradation of phenol and chlortetracycline hydrochloride. The absorption spectra, fluorescence spectra, photocurrent density, impedance spectra, and ESR radical measurements of eight different photocatalysts were investigated. On this basis, combined with a discussion on the matching of the molecular orbital energy levels of pyridine derivatives and 1,10-phenanthroline with the band gap of Er-Fe-TiO 2 , a possible mechanism of electron transport was proposed for the photocatalysis process. We studied the degradation of chlortetracycline hydrochloride or a mixture of phenol and four antibiotics using four composite photocatalysts. The possible degradation sites of chlortetracycline hydrochloride were predicted by theoretical calculations, and some results were consistent with those detected by HPLC-MS.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2015
·
IF 2.288
J.L. Wang,E.H. Song,M. Wu,W.B. Dai,S. Ye,Q.Y. Zhang
Selectively enhanced green upconversion (UC) and near-infrared (NIR) downconversion (DC) emissions of Er 3+ by Yb 3+ -Mn 2+ dimer sensitizing have been demonstrated in Er 3+ /Yb 3+ /Mn 2+ tri-doped spinel MgGa 2 O 4 upon excitation of 980 nm laser diode (LD). By optimizing the doping rate of Mn 2+ , the intensity ratio of green to red UC emission intensities of Er 3+ (G/R) could be enhanced about 10 times. Meanwhile, the 1.5 μm NIR DC emission could also be increased about 3.6 times in this system. The DC and UC emission properties, UC mechanism, as well as the enhancing mechanism have been investigated and discussed in detail. A selectively enhancing mechanism based on Yb 3+ -Mn 2+ dimer sensitizing is proposed to explain the selectively enhancing phenomena. This work could inspire the design of novel UC materials for various applications, such as temperature sensors and optical transmission, etc.
研究领域:
光学材料
·
生物医学光子学
·
无机功能材料
·
分子影像
·
转化医学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Hao Lin,Dekang Xu,Yongjin Li,Lu Yao,Liqin Xu,Ying Ma,Shenghong Yang,Yueli Zhang
Lanthanide-doped upconversion (UC) materials are commonly excited by 700–1000 nm laser because of Yb 3+ (980 nm excitation) and Nd 3+ (808 nm excitation) are typically used as sensitizers. However, the excitation band located in the second near-infrared window (NIR-II, 1000–1700 nm) demonstrates the deeper penetration in biological tissue with minimum tissue scattering and autofluorescence. Herein, intense red UC emission in Er 3+ -sensitized NaLuF 4 particles under 1532 nm NIR-II excitation is presented. Red UC luminescence is significantly enhanced and purified through confining the 1532 nm excitation energy by Ho 3+ and Tm 3+ mediators, via an energy back transfer pathway (Er 3+ → Ho 3+ → Er 3+ and Er 3+ → Tm 3+ → Er 3+ ). Furthermore, when the particles injected into the fresh beef, red UC luminescence can be distinctly observed from the inside of beef under 1532 nm NIR-II excitation, implying the deep penetration of 1532 nm NIR-II excitation and 660 nm red UC emission. Our results suggest that bright red UC luminescence from Er 3+ -sensitized NaLuF 4 crystals with 1532 nm NIR-II excitation may be suitable for deep optical imaging .
研究领域:
材料科学
·
生物医学工程
·
光学成像
·
纳米医学
·
分子影像
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yaxing Han,Ji Chen,Yuefeng Deng,Tianchi Liu,Hailian Li,Deqian Li
The current separation technique of ion-adsorption high yttrium (Y) rare earth ore (high-yttrium ore) using 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (P507) and naphthenic acid (NA) has been confronted with low separation efficiency and high acid consumption. This is a consequence of the low selectivity and the difficulty of complete stripping of heavy rare earths (HREEs). Therefore, an innovative separation technique of high-yttrium ore was proposed. The leachate of high-yttrium ore was firstly divided into Erbium (Er) / Thulium (Tm) groups with P507-isooctanol followed by separating Y (III) from the high Y-enrichment of Er (III) group with sec -octylphenoxy acetic acid (CA12)-tri- n -butyl phosphate (TBP). The basic thermodynamics experiments and cascade extraction simulations were conducted to verify the feasibility of this technology. The results show that P507-15vol% isooctanol is superior to P507 in both stripping ability and separation selectivity of HREEs. The first cascade extraction for Er (III) / Tm (III) grouping with P507-15vol% isooctanol was simulated successfully, reducing acid consumption but obtaining high purity products. In theory, the second cascade extraction simulation designed for separating Y (III) with CA12-TBP could not only improve the separation ability between Y (III) and light rare earths (LREEs) but also shorten the extraction stages and reduce the production costs. All these results revealed that this two-step separation process probably provided a promising application prospect for separating high-yttrium ore.
研究领域:
冶金工程
·
稀土化学
·
分离科学与技术
·
资源加工工程
·
湿法冶金
·
萃取分离
✓ 已验证
DOI
高影响因子
Laser & Photonics Reviews
·
2024
·Vol. 18
·期 11
·2400151
·
IF 9.8
Jiaoyin Zhao,Jiwen Chang,Nan Wang,Peihang Zhao,Mengyuan Zhu,Ying Liu,Dongxu Guo,Yu Wang,Panlai Li,Zhijun Wang,Hao Suo
Thermal quenching of luminescence materials poses a major obstacle to the technological application of luminescence thermometry. It still remains challenging to attain thermally enhanced light emissions, especially in the second near-infrared window (NIR-II). Herein, an anomalous thermal dependence of NIR-II luminescence in the negative thermal expansion (NTE) Sc 2 Mo 3 O 12 :Er 3+ /Ho 3+ nanocrystals is reported. Mechanistic investigations affirm that Ho 3+ ion can work as an energy reservoir and back-transfer to Er 3+ ion with the assistance of lattice phonon at elevated temperatures. Moreover, the Ho 3+ -mediated energy feedback is strengthened by the thermal contraction between dopant ions, thereby enabling a remarkable thermal enhancement of NIR-II emission over 11-fold. The opposite thermal response of Er 3+ and Ho 3+ emissions is harnessed for NIR-II ratiometric thermometry, registering exceptional performance in a high-temperature regime ( S r = 1.71% K −1 , δT = 0.2 K at 513 K). These findings may inspire new insights for addressing the thermal quenching of NIR-II luminescence, which also raises exciting opportunities for flexible thermometry in complex settings.
研究领域:
材料科学
·
光学材料
·
纳米科技
·
生物医学工程
·
分子成像
·
温度传感
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2018
·
IF 2.732
Qinghua Yang,Benxue Jiang,Shuilin Chen,Yiguang Jiang,Pande Zhang,Jun Wang,Shiqing Xu,Long Zhang
Al 2 O 3 : Er 3+ /Yb 3+ transparent ceramics codoped with Zn 2+ ions with intense upconversion and near infrared emission were prepared by conventional solid-state reaction and vacuum and hot isostatic pressing sintering. The effects of Zn 2+ incorporation to the structure, transparent, upconversion and NIR luminescence were discussed in detail. The as prepared Al 2 O 3 ceramics exhibited a total transmittance of ~ 75% in infrared regions (800–3300 nm) and ~ 50% in visible regions (500–800 nm). Under the excitation of a 980 nm laser diode , the as prepared Al 2 O 3 ceramics displayed two tense upconversion emission peaks of a green one centered at 550 nm and a red one centered at 660 nm and a tense near infrared emission peak centered at 1.532 µm, characteristic of Er 3+ emission. Compared with Er 3+ /Yb 3+ doped only, Zn 2+ codoped Al 2 O 3 :Er 3+ /Yb 3+ transparent ceramics showed higher upconversion and near infrared emission of ~ 11 times and ~ 4 times, respectively. The enhancement mechanism due to incorporation of Zn 2+ ions was also discussed in detail.
研究领域:
材料科学
·
光学材料
·
无机非金属材料
·
发光材料
·
陶瓷工程
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Lei Wang,Xiaohong Ji,Qinyuan Zhang
The 1530 nm emission of the Er intra-4f transition (4I13/2 → 4I15/2) is essential for telecom communication because it corresponds to the minimum-loss window of silica optical fibers. Herein, we develop a metal–semiconductor–metal structured light source based on O–Er co-doped MoS2. The electroluminescence device exhibits the 1530 nm emission at low drive voltages (<5 V), which is beneficial from the impact excitation with the space–charge-limited conduction mechanism. The characteristic of symmetric structure allows the devices to exhibit consistent electrical and electroluminescence performance at positive and negative voltages. The O doping contributes to such high-current electrical behavior, and the Er doping leads to increased trap-filled-limited voltage due to increased trap density. This work lays the foundation for developing near-infrared light sources constructed with two-dimensional materials.
研究领域:
材料科学
·
光电技术
·
纳米技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Yuan Gao,Ling Huang,Qingzhuo Li,Wei Liu,Jianpeng Chen,Shouqi Wang,Binyi Zhang,Jiutao Gao,Chang-Jiu Li,Cheng-Xin Li
Low-temperature solid oxide fuel cells (LT-SOFCs) are key to meeting China's dual-carbon goal, but existing solid electrolytes suffer from low conductivity. Here, a highly conductive Er/Ce co-doped bismuth oxide (Er x Ce5SB, x = mol%) electrolyte is reported. Synthesis is achieved by reverse coprecipitation , and Er x Ce5SB has a cubic fluorite structure with a uniform particle size of 100–200 nm, although Er5Ce5SB and Er10CeSB contain a minor rhombohedral phase. Dense pellets (relative density: 93 %) are formed after sintering at 800 °C for 6 h, and the lattice constants decrease with the increase in erbium dopant concentration. Er20Ce5SB had an impressive ionic conductivity of 0.016 S cm-1 at 450 °C. Notably, after being annealed at 600 °C for 4032 h, Er20Ce5SB showcased a commendable stability in conductivity, measuring approximately 0.09 S cm −1 , with only a minor drop in its conductivity value. Even after such extended annealing, Er20Ce5SB retained its pure cubic phase structure, devoid of any impurities. Oxygen-ion ordering yields a superstructure , as observed by HR-TEM. Because of its high conductivity and long-term stability, Er20Ce5SB is a promising LT-SOFC electrolyte material.
研究领域:
材料科学
·
能源材料
·
电化学
·
燃料电池
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2022
·Vol. 35
·期 2
·369-374
·
IF 1.09
Huang Kai,Zhang Feng,Zhao Feng-Jiao,Yin Hong-Ming
Erbium doped borate glass is widely used in luminescent materials, the luminescence dynamics of erbium doped borate glass is of great significance for optimizing and improving the luminous efficiency. The 2% molar ratio erbium doped borate glass was synthesized by the traditional melt quenching method, and annealed at 260 °C below the borate glass transition temperature. The thermal performance parameters of borate glass undoped and doped with Er 3+ were measured by differential scanning calorimetry with 10 °C/min. The transient emission spectrum and decay kinetics curves were measured for the luminescence mechanism of erbium doped borate. Er 3+ ions have different lifetime when emitted at 556 nm with different excitation wavelengths, the excited state trap may exist in erbium doped borate glass.
研究领域:
材料科学
·
光学
·
发光材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）